#include <stdio.h>


//stu等价与struct student，pstu等价于struct student*
typedef struct student{
    int num;
    char name[20];
    char sex;
}stu,*pstu;
int main() {
    stu s={0};
    pstu p1=&s; // stu *p=&s;pstu相当于定义了指针
    printf("Hello, World!\n");
    return 0;
}
